The "ヤマト運輸　最短お届け予定日自動表示" app is designed to enhance the overall value of e-commerce websites. For users, it reduces shopping stress associated with delivery date uncertainties, allows scheduling deliveries to match their personal plans, and boosts motivation by providing the earliest possible delivery date. Merchants can benefit by improving customer satisfaction, reducing cart abandonment through reliable delivery dates, gaining a competitive advantage with faster delivery speeds, and enhancing operational efficiencies by minimizing delivery inquiries. The app specifically serves shipments handled by Yamato Transport, requiring a separate corporate contract with Yamato for those who haven't yet. With easy postal code input, users can view the earliest delivery dates on both product and cart pages. Additionally, the app offers flexible delivery settings, accommodating various considerations such as business days, cutoff times, and store holidays.